Question

The main source of water is
A. River
B. Canals
C. Rainwater
D. Underground water

Answer 1

The water in this process is collected and stored. It is collected on the roof of a house and it is redirected to a tank. It is the best technique to use water for household purposes. It is practised in areas where drought is very frequent.

Complete answer: The main source of water is the rainwater. The water cycle is a process that involves evaporation, condensation and precipitation and the output is rainwater. The water source is important in the water cycle. The water resources are lake, pond, canal, the river from where water evaporates. Underground water is also part of the water cycle. We all know the underground water does not directly evaporate because it is present inside underground but underground water is absorbed by plants. Plants form the link between underground water and the water cycle. Plant performs a transpiration process in which water present in the plant evaporates from the surface of leaves due to sun heat. So, with the help of transpiration underground water participates in the water cycle. So from the above information rainwater is the main source of water to the soil.
So the correct answer is option C.

Note: Types of soil on the basis of water holding capacity are:
i. Sandy soil: It is made up of sand and clay. Clay is present in small amount, so water holding capacity of sandy soil is poor
ii. Clayey soil: It is made up of clay and has a high water holding capacity.
iii. Loamy soil: It contains clay, silt and sand. Its water holding capacity is between sandy soil and clayey soil.